Process of coating with precious metal.



rnmx o. mans, or BAN rnanorsco, canrronma.

rnocrss or coarmo WITH PRECIOUS METAL.

No Drawing.

To all whom it may concern.- v

.Be it known that I Fnmx O. Animus, a

citizen of the United states, rsiding at the city and county of San Francisco and State of California, have invented certain-new and useful Improvements in Processes of Coating with Precious Metal, ofwhich the following is a specification.

The present invention relates to improvements in the art of applying old or like metal to lass surfaces such as isplay signs or the li re, and the invention has for its principal objects to dispense with the necessity of applying the gold in leaf form and by the aid of a brush, which is the present process, and by so doing reduci the cost of manufacture of the coated artic e and inthe output of the establishments creasi for this tpurpose; to provide a method whereby e coating is applied in a liquid form and in an even, unbroken film or surface of uniform color, thereby overcoming the joint lines and patches which are present when the leaf is applied by the present brush process, and overcoming the ob ection of the coating or film being in various colors due to the different shades of the respective leaves applied; and to provide a method whereby the coating after being applied may be toned or darkened, if desired.

In employin my improved process, the surface of the g ass to be coated or to receive the thin film or deposit of metal is first chemically cleaned to insure the removal of any foreign substances therefrom, and thence subjected to a coating or a solution of ninet grains of muriate of tin dissolved in a gal on of water which is cured thereover, and after bein allow to stand a short time is rinsed o leaving a portion of the tin solution which forms a metallic deposit to which the gold-will adhere. I then prc are three solutions, and for clearncss of escription will number the same solutions, one, two and three. Solution number one com rises one ounce of chlorid of gold dissolve in a gallon of water, and solution number two consists of one and one-half ounces of an alkali preferably potassium carbonate dissolved in a gallon of water, and to which solution is'ladded two thud ounces of solution number one. Solutlon number three is formed by dissolving thirtyfive grains of en ar, preferabl grape sugar, in two gallons 0 water. Wit the solutions thus prepared, .I take a onealf fluld ounce Specification of Letters Patent.

sive meth Patented Oct. 15, 1918 Application filed September 81, 1915. Serial No. 61,789.

of. solution numberone one ounce of solution number twoand four ounces ofsolution number three and thoroughly mix the w some in any well known manner, and then after the glass has been placed level, the mixture of the three solutions is cured over the surface thereof, which has previously treated with the muriate of tin sol'ution, and is allowed to stand a sufiicient time to ermit the depositing and fixing of the gol or film coating on the surface thereof, and after which time the excess solution is poured 011'. Should it be desired a number of applications of a mixture of the three solutions ma be applied until a deposit of the desired tiickness is ohtained.

The deposit is now hacked or coated with a film of silver solution of the well known type now universal] in use for this purpose, and which is a plied in the well known manner, and whic affords a lprotection for the gold deposit and insures t e lasting thereof.

Should it be desired to tone or darken the deposit, the silver solution applied thereto is"first produced in the following manner. To one ounce of said silver solution there is added eight ounces of water, and then fifteen drops of a solution of nitrate of copper,

which has been prepared by mixing thirty posit bein translucent, ermeate't e gold eposit an provide a dar backing or body for the some.

It is apparent that the gold de osit as applied to the surface I) flowing t a same thereon di cnses with e slow and ex onnow universally in use an by the mixture of the component parts of the solution, the same dries in a hard deposit or film which readily adheres to the surface coated and. thus dispenses with the heatin or electroplating process which is employe fonjhis purpose. By employing the solution components of my present formula I amgnabled to quickly cover a considerable surface of'glass with a thin film at little cost and-thereby reduce the cost of manufacture of metal coated articles of the type above set forth.

I'claim:-

1. The method of gold plating a transparent article, the steps of which com rise in pplying to the sc im t be treatcd a body to which old will adhere, then applyin by flowing t ereover and without the app ication of heat, a solution containing chlorid of gold, potassium carbonate and sugar, permitting the gold to settle in a film coating on the treated surface, removing the excess of the solution by permitting the same to flow therefrom on the tipping of the article and then applying to the film of gold a toning backing of silver solution having nitrate of cop er intermixed therewith.

2. T ie method of gold plating the surface of a transparent article, the steps of which comprise in treating the surface thereof to free the same of foreign substance, then applying to the surface a metallic deposit to which gold will adhere, applying to said base by pourin thereovei' and without the application of cat either to the article or to the solution an alkaline solution containing chlorid of gold, permitting the gold to deposit thereover as a film coating, removing the excess of the solution by ti pi the article to permit the same to flow t ere room, then toning the color of the said film coating by applying thereto a solution containing nitrate of copper.

In twtimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

FELIX O. ANDRES.

Witnesses:

HARRY A. TUITEN, D. 'B. RICHARDS.

DISOLAIMEZR 1,981,262-.- -Fl-iz 0. Andrea, ,smi Francisco, one. Pnocnss or Connie wmr Paaclous METAL. Patent dated October 15, 1918. Disclaimer filed May23, 1930, by the patentee. 4 Hereby enters this disclaimer of so much of claims 1 and,2 of said specification as .is iii-excess of the follo 1. The method of gold plating a transparent article, the steps of which comprise m applyin to the surface to be treated a body to which gold will adhere, then applyin by sowing thereover and withoutthe application of heat, a solution containing 0 orid of gold, potassium carbonate and sugar. dilutedas a substance effective to control or regulate the chemical reactions, permitting the gold to settle in a film coating 01! the treated surface, removin the excess of the solution .by permitt' the same to flow therefrom on the tipping o the article d then appl to the lifm of old ahprotecltiye toning backing of silver solution having nitrate 0 copper intermixed t erewit 2. The method of gold plating the surface of a transparent article, the steps of which comprise in treating the surface thereof to free the same of foreign substance, then applgmg to the surface a metallic deposit to which gold will adhere, applying to said, base 'y pouring thereover and without the application of heat either to the article or to the solution an alkaline solution sufiiciently diluted to control or regulate the chemicahreaction with chlorid of gold, permittin the gold to deposit thereover as a filmcoating, removing the excess of the solution y tipping the article to permit the same to flow therefrom, then toning the color of saidfilm coating by applying thereto a solution containing nitrate of copper. Gazette June 10, 1.930.] 

